Spraying machine



A. L. GRAMMEP SPRAYING MACHINE Filed Sept. 29, 1925 2 Sheets-Sheet 1 '1 FIG 2. mans/WW1? W/T/VfSS. G I

1,592,100 A. L. GRAMMER v SPRAYING MACHINE Filed Sept. 29, 1925 2 Sheets-Sheet 2 /A VZ' IVTUR' /4//err Z Grammr a Fl SMW Patented July 13, 1926.

UNITED STATES ALLEN I4. GRAMM'ER, OF GLENSIDE, PENNSYLVANIA.

SPBAYING MACHINE.

Application filed September 29, 1925. Serial No. 59,252.

Objects of the present invention are to provide for satisfactorily spraying comparatively small quantities of fluid such as melted or fused wax or parafline on printed sheets as they emerge from the press in order to oppose or prevent oifset, and such as oil on textiles; to provide for accurately adjusting or throttling the quantity of fluld sprayed; to provide for intermittently interrupting the spray; to provide for aneven distribution of the spray; and to rovide a comparatively simple, reliable an eflicient spraying device.

Other objects of the invention will appear from the following description whlch will be made in connection with the embodiment of it chosen from other embodiments for the sake of illustration in the accompanying drawings forming part hereof, but it may be said that the invention, generally stated, comprises a revoluble feed wheel and a nozzle from which the spray issues and which is provided with an air channel and with a duct communicating with the air channel and with the surface of the wheel and arranged for suction operation, and the invention further comprises the improvements to be presently described and finally claimed.

In the drawings- 4 Figure 1 is a cross sectional view taken generally on the line 1-1 of Fig. 2 and illustrating the construction of one of the nozzles.

Fig. 2 is a front view illustrating at the lefthand a group of nozzles and at the righthand nozzles with the front portions progressively removed.

Fig. 3 is a front view drawn to a reduced scale illustrating a complete assembly for sprayingmelted wax or parafiine.

Fig. 4 is a top or plan view drawn to an enlarged scale of the parts shown at the righthand side in Fig. 3.

Fig. 5 is an elevational view partly in section drawn to an enlarged scale of t a parts shown at the righthand side of Fig. 3, and

Fig. 6 is a diagrammatic view illustrative of the distribution of the spray upon an ob- 'ect.

1 For the sake of brevity and clearness of description the invention will be described as it is illustrated and in connection with the spraying of melted wax or paraffine upon a sheet or web a as it leaves a printin press for the purpose of avoidin olfset an from that description those skilled in the art will, without the exercise of invention, be able to apply the invention of spraying other material upon other objects.

Referring more'particularly to Fig. 1, 1 is a revoluble feed wheel arranged to dip into a reservoir 2 to which fused or melted 'parafline is supplied. 3, generally, is a nozzle structure from which the spray issues and which is provided with an air channe 4 and with a duct 5 communicating with the channel 4 and with the surface of the wheel and arranged for suction operation so that the air passing across the outlet of the duct 5 brings about a feed of wax from the rim or periphery of the wheel through the duct 5, and this wax, thus fed in relatively small quantlty, is carriedforward by the air and discharged in the form of spray indicated at b. In the construction shown the nozzle structure comprises a fixed part 6 extending across the printing press and provided with spaced bearings 7 and with the reservoir 2, and with the overflow chamber 8 in communication with the reservoir 2 over the dam 9. Mounted on the fixed part 6 is an air line 10 having air outlets 11 arranged at intervals. The nozzle structure also comprises the movable .part 12 hingedly supported by the air line 10 and having a scrapmg or knife edge 13 adapted to ride on the wheel 1 and by scraping to accumulate wax 1n the pocket 5 provided near the knife edge and the movable part 12 is pressed by the spring 14 for causing the knife edge to operate as described. The duct 4 at one end thereof communicates with the opening 11 and at the other end portion after extending downward opens through the front of the movable part 12. Applied to the front of the move le part 12 is a U-shaped liner 15, Fig. 2, and a cover plate 16, and the front wall of the nozzle plate is provided with a recess confronting the notch in the liner plate 15, and into the space thus provided the end of the duct 5 projects. There are a number of wheels 1 spaced apart on a shaft 17 and there are a number of movable nozzle parts 12 each of which is forked at its end as at 18, Fig. 2, to receive the wheel 1 which cooperates with it and to guide the movable part 12. 19 is a heater shown as of the electric variety and its purpose is to insure fluidity of the wax in the receptacles 2 and 8. 20 is a pressure regulator that may be interposed in the air line 10. 21 is a pipe connectlon for feeding melted wax from the tank 22 to the reservoir 2 in which the level is kept constant by overflow of any excess over the dam 9 into the receptacle 8 from which it may be returned to the tank 22, for example, by a pipe connection 23. 24 is a pump by means of which melted wax is fed from the tank 22 through the connection 21. One mechanism may well be used for rotating the shaft 17 and for operating the pump 24. Referring to Fig. 4, 25 is a shaft driven continuously as by power applied to the sprocket wheel 26. This shaft 25 is provided with bevel gears 27 which operate a friction disk drive 28 and 29 of which the part 29 is endwise movable on a shaft 30 which, through gearing 31, rotates the shaft 17 and with it the wheels 1. The speed of rotation of the wheels 1 determines the quantity of wax sprayed, and this speed may be increased or diminished by adjusting the element 28 of the friction drive with respect to the center of the element 29. The shipper lever 31 operates to establish and disestablish contact between the elements 28 and 29 which is normally maintained by the spring 32, and a cam 33 on the shaft 25 operates the shipper lever 31 intermittently, thus producing a dwell in the rotation of the wheels 1 during which the spraying of wax is suspended and which may correspond with the interval during which the emission of a printed sheet from the press is suspended. As shown the cam 33 is provided with an adjustable shroud 34, so that the length of the dwell may be adjusted. The shaft 25 is provided with a crank pin 35 engaging a notch 36 provided between spring pressed pivotal arms 37, Fig. 5, connected with the plunger 38 of the pump 24 to provide a safety release in case of accidental stoppage of the plunger.

The operation may be described as follows: Air traversing the channels 4 sucks wax scraped from the rims of the wheels 1 into the pockets 5 and discharges it in jet form through the generally rectangular orifices or notches 39, and t-hesejets overlapping cause a comparatively uniform distribution of wax on the object a, as indicated in Fig. 6. To interrupt any jet the movable part 12 of the nozzle from which it issues can be turned upward about the air line 10 as a center. This may be called an emergency interruption. A normal interruption of all the jets is caused by the described dwells in the rotation of the shaft 17 brought about by the cam 33 as described. Another interruption of the jets may be brought about by driving the sprocket wheel 26 from some portion of the press which stops when the press steps so that when the press is stopped the wheels 1 are at rest and no wax is fed by them. The quantity of wax sprayed is adjusted by shifting the element 28 which changes the speed of rotation of the shaft ,17.

It will be obvious to those skilled in the art that modifications may be made in details of construction and arrangement and in matters of mere form without departing from the spirit of the invention which is not limited as to such matters or otherwise than as the prior art and the appended claims may require.

I claim:

1. A spraying machine including a revoluble feed wheel and a nozzle from which the spray issues and which is provided with an air channel and with a duct communicating with the air channel and with the surface of the feed wheel and arranged for suction action.

2. A spraying machine including a revoluble feed wheel and a nozzle from which the spray issues and which is provided with an air channel and with a duct communicating with the air channel and with the surface of the feed wheel and arranged for suction action, a reservoir for the fluid to be sprayed and into which the wheel dips, means for supplying air under substantially constant pressure to the air channel, and means for driving the wheel at different speeds tovary the fluid feed.

3. A spraying machine including a revoluble feed wheel and a nozzle from which the spray issues and which is provided with an air channel and with a duct communicating with the air channel and with the surface of the feed wheel and arranged for suction action, a reservoir for the fluid to be sprayed and into which the wheel dips, means for supplying air under substantially constant pressure to the air channel, means for driving the wheel at different speeds to vary the fluid feed, and means for driving the wheel with an intermittent motion.

4. A spraying machine including a fixed nozzle part provided with a revoluble feed wheel and with a constant level reservoir into which the wheel rim dips, and a hinged nozzle part riding on said wheel and provided with an air channel from which the spray issued and with a duct communicating with said air channel and with the surface of the wheel and arranged for suction action.

5. A spraying machine including a revoluble feed wheel, a nozzle provided with an air channel opening through its end wall, a liner plate applied to said wall and having a U-shaped notch communicating with the open end of the channel, a cover plate applied to the liner plate and having a rectangular notch communicating with the U- shaped notch, and a duct provided in the nozzle and communicating with the wheel surface and with the space provided by the U-shaped and rectangular notches.

6. A spraying machine including a fixed nozzle including a fixed nozzle part provided with a revoluble shaft having spaced feed wheels and with reservoir provisions common to said wheels and into which their rims dip, a group of spring pressed hinged nozzle parts of which one rides on each wheel and of which each is provided with an air channel and with a duct communicating with said air channel and with the rim surface of a wheel, and an air line common to all the nozzles and constituting the-hinged element thereof.

7. A spraying machine including a revoluble feed wheel, a hinged nozzle provided with an air channel opening through its end wall and having in its end wall a recess, aliner plate applied to said wall and having a U-shaped notch confronting the recess in the wall and communicating with the open end of the air, channel, a cover plate applied to the liner plate and having a rectangular notch communicating with the U- shaped notch, and a duct provided in the nozzle and communicating with the wheel surface and projecting into and communicating with the space provided by said notches and said recess.

8. A spraying-machine including a revoluble feed wheel, and a nozzle from which the spray issues and which is provided with a knife edge and with a pocket for accumulating material at the surface of the wheel, and said nozzle also provided with a ductcommunicating with the air channel and with the surface of the feed wheel adjacent said pocket and arranged for suction action.

ALLEN L. GRAMMER. 

